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1. (WO1991018137) METHOD AND APPARATUS FOR DEPOSITING MOISTURE-ABSORBENT AND THERMOPLASTIC MATERIAL IN A SUBSTRATE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/018137 International Application No.: PCT/US1991/003428
Publication Date: 28.11.1991 International Filing Date: 16.05.1991
Chapter 2 Demand Filed: 09.12.1991
IPC:
A61F 13/53 (2006.01) ,A61F 13/15 (2006.01) ,A61F 13/49 (2006.01) ,D04H 1/54 (2012.01) ,D04H 17/00 (2006.01)
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
F
FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
13
Bandages or dressings; Absorbent pads
15
Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
53
characterised by the absorbing medium
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
F
FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
13
Bandages or dressings; Absorbent pads
15
Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
F
FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
13
Bandages or dressings; Absorbent pads
15
Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
45
characterised by the shape
49
specially adapted to be worn around the waist, e.g. diapers, nappies
D TEXTILES; PAPER
04
BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
H
MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING
1
Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
40
from fleeces or layers composed of fibres without existing or potential cohesive properties
54
by welding together the fibres, e.g. by partially melting or dissolving
D TEXTILES; PAPER
04
BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
H
MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING
17
Felting apparatus
Applicants:
NORDSON CORPORATION [US/US]; 28601 Clemens Road Westlake, OH 44145, US
Inventors:
MOLNAR, Julius, J.; US
FENA, Ernest, J.; US
FOLDEN, David, W.; US
SCHNEIDER, Douglas, A.; US
BECKER, Richard, A.; US
FIMMEN, Charles, L.; US
SELESTAK, David, M.; US
SHLAPAK, Robert; US
Agent:
KAUTZ, Thomas, L. ; Wood, Herron & Evans 2700 Carew Tower Cincinnati, OH 45202, US
Priority Data:
525,88017.05.1990US
Title (EN) METHOD AND APPARATUS FOR DEPOSITING MOISTURE-ABSORBENT AND THERMOPLASTIC MATERIAL IN A SUBSTRATE
(FR) PROCEDE ET APPAREIL DE DEPOT DANS UN SUBSTRAT D'UNE MATIERE THERMOPLASTIQUE ABSORBANT L'HUMIDITE
Abstract:
(EN) A method and apparatus for forming a nonwoven pad (30) of fibrous material (28) is provided in which highly moisture-absorbent particles (36) and thermoplastic material are intermixed with the fibrous material throughout one or more predetermined portions of the thickness of the nonwoven pad while maintaining other portions of the thickness of the pad substantially free of highly moisture-absorbent particles and/or thermoplastic fiber material. The nonwoven pad is formed on one side of a conveyor (18) moving through a forming chamber (12) which has a duct (22) connected to a source of vacuum (24) operable to draw fibrous material injected into the chamber onto the conveyor. One dispenser (40) discharges the highly moisture-absorbent material at a predetermined location relative to the fibrous material being drawn onto the conveyor, and at least one other dispenser (56, 68, 83, 84) discharges the thermoplastic fiber material.
(FR) L'invention se rapporte à un procédé et à un appareil servant à former un tampon non tissé (30) de matière fibreuse (28), dans lesquels on mélange conjointement des particules (36) à forte capacité d'absorption de l'humidité et une matière thermoplastique à la matière fibreuse sur une ou plusieurs parties prédéterminées de l'épaisseur du tampon non tissé, tout en laissant les autres parties de l'épaisseur du tampon pratiquement dépourvues des particules à forte capacité d'absorption de l'humidité et/ou de la matière fibreuse thermoplastique. Le tampon non tissé est formé sur un côté d'une bande transporteuse (18) se déplaçant à travers une chambre de formation (12) qui comporte un conduit (22) relié à une source de vide (24) destinée à aspirer la matière fibreuse injectée dans la chambre sur la bande transporteuse. Un premier distributeur (40) décharge la matière à forte capacité d'absorption de l'humidité en un endroit prédéterminé par rapport à la matière fibreuse aspirée sur la bande transporteuse, et au moins un second distributeur (56, 68, 83, 84) décharge la matière fibreuse thermoplastique.
Designated States: AT, AU, BB, BG, BR, CA, CH, DE, DK, ES, FI, GB, HU, JP, KP, KR, LK, LU, MC, MG, MW, NL, NO, RO, SD, SE, SU
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, ML, MR, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0530301JPH05507324CA2081916KR1001540990000*AU1991079578